Answer / denzel101

Ammeters and voltmeters read R.M.S values

Symmetrical faults are balance faults occuring in power
system. For a fault to be classified as symmetrical, all
three phases must draw equal fault currents and the phase
displacement must remain 120 degrees. examples

1. all phases shorted to each other.
2.all three phases shorted to earth.

Unsemmetrical faults occurs when one or two phases are
shorted to earth or two phases to each other.the faulty
phases will draw fault currents which are not equal in
magnitude with healthy phases and does not have 120 degree
phase displacement.

Answer / anil

ammeter and voltmeter always reads R.M.S value of the measurement only

and when comes to faults
symmetric faults: 3 phase faults
unsymmetrical faults:
1. L-L FAULT
2. L-G FAULT
3. L-L-G FAULT

i have flexible wire. size of conductors is 0.190 mm & no.of conductors are 48. then size of wire comes 1.37 sqmm instead of 1.5 sqmm . the what is tolerance for this size.

0 Answers  

---

An automatic water heater is an example of which type of control system?

0 Answers   GE,

---

what is effect of leading power facter on the system and billing

0 Answers   TATA,

---

Sir if i have 2kv ups in which 17ah 8 battries load 600watts how much back up time i get and if i put 6kv ups with the same no of battries same amp can i get more back up time please give reply exactly what is the procedure to calculate back up time for different kv,s

3 Answers  

---

As per the Anchor capstan motor specification, full load current is 200A. starting current is 1750 A and acceleration time is less than 8 seconds. Please guide for selection of cable size.

0 Answers  

---

What will be the effect of circulating current in HT xlpe cable when both the armour ends are grounded. Will the termination fils after some time in case of 33 kv supply.

0 Answers  

---

In 3pin or 5pin socket why the earth pin is bigger

3 Answers  

---

how can we charged the battery in DG

2 Answers   MTS,

---

Find the octal equivalent for the binary number 101101110

1 Answers   Ecil,

---

what are the effects of variations in frequency when you are connected to national grid??

1 Answers  

---

What is mean by ideal infinite bus? Why it is required to consider in fault short circuit calculations?

1 Answers  

---

hai iam arunkumar. i have applied for an section enginner in rrb. i want lat 5 years solved question papers. if u have please sedn it to arun30682@gmail.com

0 Answers   RRB,

---